HISAMATSU MR54 Wet and Dry Thermo-Hygrometer
- simple form of psychrometer provides an easy way to measure the amount of water vapour in the atmosphere, on a percentage scale known as Relative Humidity ( % RH)
- difference between the wet and dry bulb temperature enables the% rH to be determined through the use of the table
- Hisamatsu type wet & Dry bulb Hygrometer model MR-54. Allow easy, quickest humidity determination by sliding cut out window.
- White m metalic scale with plastic case. Range -20 to 50° C